How wide a 17" front tire for 66 Dart?

No drums on this one, front discs will be 12" 6piston wilwood (which are excellent brakes that even clear some 15x8" rims if you can get away with enough backspacing)
I´m building this car from scratch, 426 small block with w5 heads, 4speed OD. Goal is a furious roadracer. I will not cut outer fenders. Spring relocation, Wheel tubes ok.
Thanks
Chris